1. Call the police: If you think you are a victim of fraud, you can report it to the local police. The police will investigate the matter and take appropriate action.
2. Contact the bank: If you use a bank loan to pay your ex-wife, please contact the lending institution and tell them your situation. They will help and stop the payment process.
3. Seek legal help: If you think you need legal aid, please consult your local lawyer. They can give you legal advice and help you take action.
4. Record evidence: collect all documents, emails and other evidence related to this matter. These evidences will play an important role in future legal proceedings.